select DriverName from Driver d, Oper o where d.DirverID=o.DirverID
union all
select to_number(a.id) from (select d.DirverID id1, o.DirverID id2 from Driver d, Oper o where d.DirverID=o.DirverID(+)) a
where a.id2 is null
union all
select to_number(a.id) from (select d.DirverID id1, o.DirverID id2 from Driver d, Oper o where d.DirverID=o.DirverID(+)) a
where a.id2 is null
解决方案 »
免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货